Which Indian city, ranked one in the list according to the 'Political Leaders Position and Action on Air Quality in India 2014-2019' report?

Russian President Vladimir Putin and North Korean leader Kim Jong Un hold first-ever talks at the Eastern Federal University Campus on Russky Island in the far eastern Russian Pacific port city of Vladivostok. The aim of this meeting is to break the deadlock over North Korea's nuclear weapons programme. The meet was a part of Six-party talks on North Korean de-nuclearization, that started back in 2003 involving China, Japan, Russia, the US along with North Korea and South Korea. The last round of such talks took place in 2007.

The Geological Survey of India (GSI) North Eastern Region (NER) installed 2 geological display boards at 2 important geological sites with geo-scientific information. The sites are Mawmluh cave and Therriaghat cave in Meghalaya. The prime objective of this was to create awareness among students, visiting tourists and the general public and will also help to conserve the site and aid the upcoming generations to be aware of such geological developments. The geological display boards are unveiled at Mawmluh cave and Therriaghat at Sobhar in East Khasi Hill District.

The newly built Coast Guard Vessel ICGS C-441 was commissioned into the service by Tom Jose, Chief Secretary of Kerala at Vizhinjam Harbour, Thiruvananthapuram. It is the seventh Interceptor vessel amongst the series which is built by M/s. L&T Ltd (Larsen & Toubro Limited), Surat. Inspector General Vijay D Chafekar, PTM, TM, Commander coast guard Region (West) Mumbai have attended the commissioning ceremony.It is 27.4 metres long and has106 tonnes displacement capacity and can achieve a maximum speed of 45 knots(83 km/hr).The vessel is powered by twin diesel engines and twin water-jet propulsion systems and has an endurance of 500 NM at 25 knots of speed.

Third Installment of the Joint Naval Exercise of India and Australia AUSINDEX is to be held off the coast of Vishakhapatnam from April 2 to 16. The joint exercise will focus on anti-submarine warfare, as part of efforts to ramp up bilateral naval cooperation in the strategic Indian Ocean region. AUSINDEX 2019 From the Australian side, HMAS Canberra (landing helicopter dock), Auxiliary Oiler Replenishment vessel, two frigates, HMAS Newcastle and HMAS Parramatta and P81 and P8 maritime patrol aircraft, will be involved in the exercise. A Kilo-class submarine, land-based Hawk aircraft that will provide the air attack element for the exercise, a Kamorta class anti-submarine vessel, besides a stealth destroyer will lead the Indian deployment for the exercise. The exercise will feature the deployment of Australian personnel on Indian ships and vice versa.

The Guwahati Railway Station has become the first station in India to obtain the ISO 14001: 2015 certification for implementation of environment management system by carrying out directives issued by the National Green Tribunal (NGT). The station also has amenities such as High-class reserve (VIP) lounge, waiting rooms, AC and non-AC retiring rooms, food courts and sanitation facilities. The certification will be reviewed in 2020 by NF Railway, which mandates stricter environmental norms regarding waste disposal among others to be adhered to Railway Station. ISO (International Organisation for Standardisation) is responsible for establishing standard in different areas of activities. There are many types of ISO certification and ISO-14001 is for environment management system as per international norms and was upgraded last in 2015. Hence the certificate is called ISO 14001:2015.

Army's Western Command chief inaugurated Rinzin Dwar, the entrance to Pirthi Military station, named after a slain Army officer, in Shimla district. It is situated at Averipatti in Rampur and is named after late Sub Rinzin Dorje of Dogra Scouts. He was an accomplished mountaineer who summited Mt Everest and several other prominent peaks.

The Government of Indonesia has hosted the first ever High-Level Dialogue on Indo-Pacific Cooperation (HLD-IPC) in its capital city Jakarta. The theme of the HLD was 'Towards a Peaceful, Prosperous, and Inclusive Region'. It was inaugurated by Indonesia's Vice President Jusuf Kalla. The objective behind this meet was to urge all participating governments to talk openly about their plans for increasing cooperation and for building trust in the Pacific Ocean and the Indian Ocean region.

The T10 cricket League is set to be played in Zayed Cricket Stadium of Abu Dhabi for the next five years, starting from 2019 season. The first match in the T10 League will be held on 23rd October 2019. Abu Dhabi Cricket (ADU) partnered with the Department of Culture and Tourism, Abu Dhabi (DCT Abu Dhabi) and Abu Dhabi Sports Council (ADSC) has entered into a five year agreement with organizers of the T10 league for 5 years. T10 is the shortest form of cricket which was first played in UAE in 2017.

The most powerful operational rocket in the world, SpaceX's Falcon Heavy, launched its first commercial mission from Florida in a key demonstration for billionaire entrepreneur Elon Musk's space company in the race to grasp lucrative military launch contracts. The 23-story-tall Heavy, which previously launched Musk's cherry red Tesla roadster to space in a 2018 debut test flight, blasted off from Florida's Kennedy Space Center carrying its first customer payload.

The Central Government has given its approval for the proposal of the Madhya Pradesh State Government, to change the name of a village in Madhya Pradesh from 'Durjanpur' to 'Shivdham'. Durjanpur is situated in Katni District of Madhya Pradesh. The Home Ministry's approval came after a no objection notice from the Geographical Survey of India (GSI), the Department of Post, the Ministry of Railways and the Ministry of Earth Sciences.